Census Tract Mapping

Generate Census Tract Maps for Census Data

Usage

create_tract_map(
  tract.tbl,
  tract.lyr,
  map.title = NULL,
  map.subtitle = NULL,
  map.title.position = NULL,
  legend.title = NULL,
  legend.subtitle = NULL,
  map.lat = 47.615,
  map.lon = -122.257,
  map.zoom = 8.5,
  wgs84 = 4326
)

Arguments

tract.tbl

A data frame of census data by Census Tract to map.

tract.lyr

A spatial layer of Census Tracts.

map.title

Character. Map title.

map.subtitle

Character. A map subtitle that will appear below the map title.

map.title.position

Character. Place the map title and subtitle in 'bottomleft','bottomright', topleft', or 'topright'.

legend.title

Character. Legend title.

legend.subtitle

Character. A legend subtitle that will appear below the legend subtitle.

map.lat

A numeric value for the latitude of the center point for your map. Defaults to 47.615 (PSRC Region)

map.lon

A numeric value for the longitude of the center point for your map. Defaults to -122.257 (PSRC Region)

map.zoom

A numeric value for the default zoom level for your map. Defaults to 8.5 (PSRC Region)

wgs84

A code for mapping, this should be pulled out of the function or something

Value

a leaflet map object.

Author

Suzanne Childress

Examples

library(sf)
#> Linking to GEOS 3.11.1, GDAL 3.6.2, PROJ 9.1.1; sf_use_s2() is TRUE
library(dplyr)
#> 
#> Attaching package: ‘dplyr’
#> The following objects are masked from ‘package:psrccensus’:
#> 
#>     between, first, last
#> The following objects are masked from ‘package:stats’:
#> 
#>     filter, lag
#> The following objects are masked from ‘package:base’:
#> 
#>     intersect, setdiff, setequal, union

tract.big.tbl <- psrccensus::get_acs_recs(geography='tract',table.names=c('B03002'),years=c(2019))
#> Getting data from the 2015-2019 5-year ACS
#> Loading ACS5 variables for 2019 from table B03002. To cache this dataset for faster access to ACS tables in the future, run this function with `cache_table = TRUE`. You only need to do this once per ACS dataset.
#> Using FIPS code '53' for state 'Washington'
#> Using FIPS code '033' for 'King County'
#> Using FIPS code '035' for 'Kitsap County'
#> Using FIPS code '053' for 'Pierce County'
#> Using FIPS code '061' for 'Snohomish County'
tract.tbl <- tract.big.tbl %>%
filter(label=='Estimate!!Total:!!Not Hispanic or Latino:!!Black or African American alone')

tract.url <- paste0("https://services6.arcgis.com/GWxg6t7KXELn1thE/arcgis/rest/services/",
                "tract2010_nowater/FeatureServer/0/query?where=0=0&outFields=*&f=pgeojson")

tract.lyr<-st_read(tract.url)
#> Reading layer `OGRGeoJSON' from data source 
#>   `https://services6.arcgis.com/GWxg6t7KXELn1thE/arcgis/rest/services/tract2010_nowater/FeatureServer/0/query?where=0=0&outFields=*&f=pgeojson' 
#>   using driver `GeoJSON'
#> Simple feature collection with 773 features and 21 fields
#> Geometry type: MULTIPOLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -123.0234 ymin: 46.72799 xmax: -120.9062 ymax: 48.29924
#> Geodetic CRS:  WGS 84
create_tract_map(tract.tbl=tract.tbl, tract.lyr=tract.lyr,
map.title='Black, non-Hispanic Population',
map.title.position='topleft', legend.title='Black, Non-Hispanic Population',
legend.subtitle='by Census Tract')